Old shingles on the way to the scrap wagon.
When the day is gray and there’s no color in the scene, don’t shoot in color. If your camera let’s you dial in a black/white setting, do it. If not, remove the color when you’re back at the computer. On the other hand, when there’s color, look for ways to add interest to it, then fill the frame. Always take time to See–Think–Act .
Add something of interest to blocks of color.